Question

A. Multiple Choice Questions
1. Acid present in sour curd is :
(a) lactic acid
D
(d) oxalic acid
(b) acetic acid
(c) tartaric acid
2. Which of the following acids is used by goldsmiths for dissolving gold?
(a) nitric acid
(b) sulphuric acid
(c) aqua regia
(d) hydrochloric acid
3. Which of the following substance present in turmeric changes its colour on reaction with
base?
(a) Lichen
(b) Magnesia
(c) Curcumin
(d) None of these
4. Complete the following analogy:
Turmeric : Indicator :: Milk of magnesia :
(a) Strong acid (b) Antacid
(c) Antidote for sting (b) Hydrated salt
5. Which of the following is a neutralization reaction?
(a) Sodium chloride + Water
Sodium hydroxide + Hydrochloric acid
(b) Calcium carbonate + Water
Calcium hydroxide + Carbon dioxide
(c) Sodium hydroxide + Hydrochloric acid
Sodium chloride + Water
(d) Copper sulphate + Zinc
Zinc sulphate + Copper.​

Answer 1

Answer:

1-a

2-c

3-c

4-c

5-b

Explanation:

1-lactic acid

2-aqua regia

3-curcumin

4-antidote of sting

5-b

Answer 2

Answer:

1. (a) lactic acid

2. (c) aqua regia

3. (c)curcumin

4. (b) antacid

5.

Explanation: